golden rule

noun
🔊/ˌɡəʊldən ˈruːl/
🔊/ˌɡəʊldən ˈruːl/
[usually singular]
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  1. an important principle that should be followed when doing something in order to be successful成功之重要原则;指导原则
    • The golden rule in tennis is to keep your eye on the ball.打好网球的重要原则是眼睛要紧盯着球。🔊🔊
    Topics Successc2